     
                                                                                                                                                                                                                     
                                                                                                                        12          1640                    1720                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            
                                                          1.      2.      3.       4.       5.        6.       7.           8.        9.          10.                                                                                                                                                                                         